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(No Model.)

J. W.- HYATT.

APPARATUS FOR PURIFYING THE WATER IN STEAM BOILERS.. No. 366,170. Patented July 5, 1887.

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R o o S Q; r5250?" U b w s -/%%1%4%; QM w wg N. EEEEEEEEEEE Lilhogmphur, Walhi DIG UNITED STATES JOHN W.

ATENT rEIcE,

HYATT, or NEWARK, NEW JERSEY, Assrenon ro THE I-IYA'IT PURE WATER COMPANY, or SAME PLACE.

APPARATUS FOR PURIFYING THE WATER IN STEAM-BOILERS.

SPECIFICATION forming part of Letters Patent No. 366,170, dated July 5, 1887.

Application filed August 6, 1886. Serial Ho. 210,160. (No model) To all whom it may concern.-

Be it known that 1, JOHN W. HYATT, a citi zen of the United States, residing at Newark,

' used has salts in solution, but is not contaminated with suspended matter.

In my co-pending patent application, No. 207,960, I have shown how an injector may be used to propel a current of impure feed-water mingled with the contents of the boiler through a filter, so as to purify both whenever the boiler is supplied with feed-water. Such a process is evidently useful where the feed-water contains any substances that can be removed by filtration, but would only occasion a needless resistance to the flow of the feed-water where the latter contained only saline ingredients in solution. WVhere salts are contained in the feed-water, the evaporation of the latter concentrates such salts to such a degree that it is customary to blow off the boiler from time to time to avoid the crystallization of such sal'ts therein.

In my invention the evaporation of the water'would be carried to a sufficient degree for the salts to crystallize; and my improvement consists in the combination, with the boiler, of a filter having its inlet connected with the water-space of the boiler, and its outlet connected with the suction of a waterinjector inserted in the feed-pi pe, and a waterconnection from such feed-pipe to the outlet of the filter, to reverse the current of fluid through the same when required.

The feed-water may be propelled to the boiler by a pump, an injector, or other source of pressure, but its current, from wherever derived, operates in passing through the circulating or water injector to induce a suction of the boilers contents through the filter, and to propel the same into the boiler mingled with the new feed-water.

The annexed drawing shows a water tube boiler mounted in brick-work, with its setting partly broken away 011 the line m 00, to expose the rear of the tubes A and the settlingdrum B; and the feed-water pipe 0 is shown provided with a steam-injector, D, to propel the feed-water into the boiler E, a water-injector, F, being inserted in such pipe between the steam-injector and the boiler, to draw the boiler-fluid through the filter G in the desired manner. The inlet of the filter is connected by a pipe, H, to the settling'drum B, and the discharge from the filter is connected by pipe I to the suction-opening J upon the waterinjector F.

Z is a steam-pipe to actuate the injector D, and it is obvious that the water propelled by such injector would pass through the bore of the circulating or water injector F and induce a current from the pipe I, which could only be supplied by drawing the boiler'fiuid from the drum B through the pipe H and filter G.

A checlovalve, m, would be inserted in the pipe 0 near the boiler, so that the stoppage of the feed at any time would prevent any reflux of water in the pipe, and the injector F and the filter would then cease to operate until the feed were again actuated.

The filter may be washed by reversing the current through the same, as is common; and a convenient means for effecting such washing is shown in a connection, a, from the feedpipe 0 to the filter outlet-pipe I, a cook, a, being provided in such connection, and a cock, I, inserted in the pipe I, adjacent to the waterinjector. The waste-pipe 0, used in cleansing the filter, and the inlet-pipe H, would also be provided with cocks 0 and H. By closing the cocks in the pipes H and I, which effect the normal circulation through the filter, and opening the water-supply cock at and the wastecock 0, the current would be reversed through the filter and the deposited impurities would be washed away.

Having thus set forth my invention, what I claim is- 1. The combination, with a boiler, of a filter, a feedwater pipe, and a water-injector, the filter inlet being connected with the waterspace of the boiler, its outlet with the suction of the water-injector, and the feed-water for feed-water pipe with the said outlet of the filter, and the filter being provided with a 1 waste-pipe and the necessary cocks to reverse the current of Water through the filter, substantially as herein set forth.

In testimony whereof I have hereunto set my hand in the presence of two subscribing wit- 2o nesses. I

JOHN W. HYA'IT.

Witnesses:

THOS. S. CRANE. L. LEE. 

